Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H19/00—Changing the web roll
  • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
  • B65H19/28—Attaching the leading end of the web to the replacement web-roll core or spindle
  • B65H19/283—Attaching the leading end of the web to the replacement web-roll core or spindle by applying adhesive to the core
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2301/00—Handling processes for sheets or webs
  • B65H2301/40—Type of handling process
  • B65H2301/41—Winding, unwinding
  • B65H2301/414—Winding
  • B65H2301/4144—Finishing winding process
  • B65H2301/41441—Finishing winding process and blocking outer layers against falling apart
  • B65H2301/41443—Specified by the place to where the sealing medium is applied
  • B65H2301/414436—Specified by the place to where the sealing medium is applied onto the web
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2301/00—Handling processes for sheets or webs
  • B65H2301/40—Type of handling process
  • B65H2301/41—Winding, unwinding
  • B65H2301/417—Handling or changing web rolls
  • B65H2301/418—Changing web roll
  • B65H2301/4181—Core or mandrel supply
  • B65H2301/41812—Core or mandrel supply by conveyor belt or chain running in closed loop
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2301/00—Handling processes for sheets or webs
  • B65H2301/40—Type of handling process
  • B65H2301/41—Winding, unwinding
  • B65H2301/417—Handling or changing web rolls
  • B65H2301/418—Changing web roll
  • B65H2301/4181—Core or mandrel supply
  • B65H2301/41816—Core or mandrel supply by core magazine within winding machine, i.e. horizontal or inclined ramp holding cores
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2301/00—Handling processes for sheets or webs
  • B65H2301/50—Auxiliary process performed during handling process
  • B65H2301/51—Modifying a characteristic of handled material
  • B65H2301/515—Cutting handled material
  • B65H2301/5152—Cutting partially, e.g. perforating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2404/00—Parts for transporting or guiding the handled material
  • B65H2404/20—Belts
  • B65H2404/23—Belts with auxiliary handling means
  • B65H2404/231—Belts with auxiliary handling means pocket or gripper type
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2408/00—Specific machines
  • B65H2408/20—Specific machines for handling web(s)
  • B65H2408/23—Winding machines
  • B65H2408/235—Cradles

Definitions

• TITLE "Rewinding machine and method for producing variously sized paper logs"
• the present invention refers to a rewinding machine and a method for producing paper rolls (so-called “logs” in the technical jargon) of various size.
• logs The production of logs is known to require the supply of a continuous paper web along a predetermined path. At a point of said path, a discontinuous transverse cut is operated on the web in order to subdivide it into portions or sheets of preset length to be separated by a tear.
• logs implies the use of tubular cardboard spools (commonly referred to as "cores") on the surface of which a preset amount of glues is distributed to allow the glueing of the first sheet of the log to be formed.
• cores tubular cardboard spools
• the said formation makes also use of winder rollers which drive the core, on which the paper winds up, into rotation.
• the process of formation of a log terminates after a preset amount of paper has been wound over the core. At this point, the formation of the next log is started.
• One important aspect to be considered relates to the procedure for spreading the glue onto the core, as necessary to fix the first sheet of the log to be formed.
• this procedure is carried out outside the winding region: the glue is distributed onto the cores to be used afterwards for the formation of the log, prior to the same cores entering the region in which they come in contact with the paper web.
• This operating mode in the case of a prolonged stop of the machine, may lead to the drying of the glue present onto the cores. It should be understood that such a situation, if not suitably rectified, leads to a faulty process.
• the operator is bound, under such conditions, to remove manually the core previously glued.
• the weight of the glue applied onto the core in the case the latter is distributed longitudinally on a rather thick line, is cause for an "unbalance" of the same core which, when considering the speed involved, may induce strong vibrations on the log in the course of formation.
• This phenomenon which can be self-intensifying, may lead to the formation of a log in which the core results out of axis .
• the main object of the present invention is to overcome the said drawbacks . This result has been achieved, according to the invention, by adopting the principles disclosed in the independent claims. Further characteristics being set forth in the dependent claims .
• FIG. 1 is a schematic illustration of a machine according to the invention
• FIG. 1 shows an enlarged detail of the drawing of Fig. 1;
• FIG. 3-10 shows schematically a sequence of steps relating to the operation of the machine of Fig. 1;
• FIG. 11 is a schematic view in longitudinal section of the first means for the application of glue in inoperative or stand-by condition
• - Fig. 12 shows the means of Fig. 11 in operative condition
• - Fig. 13A is a partial side view of a possible embodiment of the blade for the means of Figs. 11 and 12, in which the blade has thin and spaced apart teeth;
• FIG. 13B is a front view of the blade of 13A;
• FIG. 14 is a partial side view of a possible embodiment of the blade for the means of Figs. 11 and 12, in which the blade has large teeth;
• - Fig. 14B is a front view of the blade of Fig. 14A;
• - Fig. 15A is a partial side view of a possible embodiment of the blade for the means of Figs. 11 and 12, in which the blade has a continuous, non-toothed profile;
• FIG. 17-28 show schematically a machine according to the invention, in different sequential operating steps, with a further exemplary embodiment of the guide channel for the cores.
• a machine according to the invention comprises:
• the roller (RA) has the dual function of feeding the paper (2) and winding it onto the core (1) , as will be best described later.
• the above said channel (C) delimits the last stretch of the path covered by the paper (2) and also the path followed by each core (1) which leaves the core- feeding station (A) and moves towards the exit of channel (C) .
• first and second means (4, 5) are provided for delivering a preset amount of glue onto the surface of each core (1) introduced into the channel (C) .
• Said glue-delivering means (4, 5) act in correspondence of the channel (C) according to a precise sequential order.
• This provides for the first delivery of the glue to the last sheet of log (RO) in the course of formation and, then, for the delivery of glue intended to attach the first sheet of a new log on a corresponding core (1) suitably introduced into the channel (C) .
• the delivery of glue by the first and second means (4, 5) is alternated by the transit of a perforation line (p) which separates the last sheet of log (RO) in the course of formation from the first sheet of the next log to be formed. More particularly, and reference being made to the Figs. 3- 10, the normal operating condition takes place as described below.
• the lever (6) After winding a preset number of sheets onto the core (1) of log (RO) under formation, the lever (6) , which introduces the core (1) standing by at the station (A) (Fig. 3) , operates the introduction of one core (1) into the channel (C) by rotating about its axis (60) and pushing the same core from the back (Fig. 4) .
• the formation of the log (RO) continues on the opposite side of channel (C) , so that the paper continues to wind up onto the relevant core (lr) by means of the winder rollers (RA, R4, R5) .
• the core (1) freshly introduced into the channel (C) , begins to advance and to roll at the same time by virtue of the contact of its surface with the surface of the roller (RA) which rotates about its own axis, as indicated by the arrow (U) .
• the angular speed of roller (R5) is decreased with respect to that of roller (RA) and roller (R4) .
• This situation causes the log under formation (RO) to move away from the surface of roller (RA) .
• the angular speed of roller (R4) is then set equal to that of roller (R5) .
• the speed difference between roller (R5) and roller (RA) determines a reduction of tension and, therefore, a loosening of the paper web (2) upstream of rollers (R4, R5) and implies also a detachment of the paper from the surface of roller (RA) (Fig. 4) .
• This detachment occurs along the channel (C) over a length extending between the core (1) and winder rollers (R4, R5) .
• the detachment of the paper from roller (RA) can be made easier by a blow of compressed air through a nozzle (7) acting between the surface of roller (RA) and the station of the winder rollers (R4, R5) .
• a suction may be operated on the side of guide (3) .
• (VU) denotes a suction unit.
• FIG. 6 shows the case in which the position of said means (4, 5) is such that the region (q) and (a), acted upon by means (4, 5), result diametrically opposite on the core
• the core (1) by moving and rolling up forwards along the channel (C) , transfers most of its glue, applied by the means
• the region (q) belongs to the last sheet of log (RO) under formation inasmuch as it results downstream of the perforation line (p) which defines the end of the same log (RO) .
• an edge (q' ) of the last sheet of log (RO) under formation results thus glued, that is, provided with glue, at some distance from line (p) : the core (1) makes up the means by which the glue is applied on the last sheet of the log (RO) since, at least in part (though in sufficient amount) , the glue is transferred by contact from the core (region q) to the paper (edge or region q' ) .
• the core (1) passes also the second glue-delivering means (5) and, by virtue of its rolling up along the channel (C) , also the region (a) of the same core (1) arrives in contact with the paper web (2) , at a region of the sheet which follows the line (p) .
• This sheet is the first one of the subsequent log to be formed.
• the glue in the region (a) is such as to cause the paper web (2) to adhere onto the core (1) which web, in the meantime and as previously mentioned, has become somewhat loose in the region between the core (1) and the end of the channel (C) , by virtue of the reduction of speed of the winder rollers (R4, R5) with respect to roller (RA) (Fig. 7) .
• the loosening effect of the paper web (2) in combination with the adhesion of the same web onto the core (1) caused by the glue present in the region (a) , is such that, during the rolling up of core (1) , there is occurs a progressive winding of the paper web (2) onto the core (1) (Fig. 7) . Thereafter, in correspondence of the terminal portion (30) of the guide (3), the first sheet of the next log to be formed results fitted (again by the effect of rolling and advancement of core (1)) between the surface of the said portion (30) and the surface of core (1) (see Fig. 8) .
• the first glue-application means (4) may comprise, with reference to the examples of Figs. 11 and 12, a liquid-glue- holding reservoir (40) located below the guide (3) , and a blade (41) provided inside said reservoir and movable from and to the channel (C) under control of a corresponding actuator (42) connected thereto via a chain of rigid transmissions (43, 44, 45).
• a corresponding actuator (42) connected thereto via a chain of rigid transmissions (43, 44, 45).
• the blade (41) In the condition shown in Fig. 11, the blade (41) is fully held within the reservoir (40) .
• the blade (41) is lifted by the withdrawal of the rod of actuator (42) and by the corresponding movements (as shown by the arrows) of members (43, 44, 45) of the transmission system.
• the lifting of blade (41) causes the application of the glue upon the surface of core (1) which, on that moment, is transiting along the channel (C) .
• the guide (3) is suitably slotted to allow the lifting of the blade (41) and the contact thereof with the surface of blade (1) .
• the upper edge of the blade (41) may be either discontinuous, that is, provided with a toothing (Figs. 13A and 14A) , or continuous (Fig. 15A) .
• the upper edge of the blade (41) may be concave, with concavity turning upwards .
• the second glue-application means (5) can be made like the first ones (4) and their description, therefore, will not be repeated.
• the number of sheets of each log (RO) and the length thereof may be as desired.
• the glue can be delivered through two injectors (32, 31) intended for delivering the glue direct onto the paper (2) upstream and respectively downstream of a perforation line (p) which separates the last sheet of log (RO) under formation from the first sheet of the next log to be formed.
• the activation of said injectors (32, 31) can be concurrent, as schematically illustrated in Fig. 16.
• the injectors (32, 31) are positioned within said channel (C) at a preset distance one from the other.
• the stationary guide of said channel (C) is into two elements:
• a first element (3a) is opposite to an underlying conveyor belt (300) ring-like closed and located immediately downstream of the section (A) which feeds the tubular cores (1);
• a second element (3b) is located downstream of the first element (3a) and of said belt (300) , opposite to roller (RA) .
• the schematic representations of Figs. 17-22 and respectively of Figs. 23-28 differ from each other only for the different positioning of the glue-delivering means which, in any case, act within the said channel (C) and are positioned at a preset distance from each other.
• the glue-delivering procedures can be combined as in Figs. 17-22 where the first glue-delivering means are of blade type, and the second delivering means are of injection type.

Landscapes

• Replacement Of Web Rolls (AREA)
• Making Paper Articles (AREA)
• Paper (AREA)
• Winding Of Webs (AREA)

Priority Applications (7)

Applications Claiming Priority (2)

Publications (1)

Family

ID=30012395

Family Applications (1)

Country Status (13)

Cited By (10)

Families Citing this family (33)

Citations (5)

Family Cites Families (9)

• 2002
  • 2002-07-08 IT IT2002FI000119A patent/ITFI20020119A1/it unknown
• 2003
  • 2003-06-27 BR BRPI0306598-7A patent/BRPI0306598B1/pt not_active IP Right Cessation
  • 2003-06-27 CN CNB038057786A patent/CN100351155C/zh not_active Expired - Lifetime
  • 2003-06-27 WO PCT/IT2003/000399 patent/WO2004005173A1/en active IP Right Grant
  • 2003-06-27 ES ES03741073T patent/ES2257683T3/es not_active Expired - Lifetime
  • 2003-06-27 RU RU2004127676/12A patent/RU2293700C2/ru active
  • 2003-06-27 AT AT03741073T patent/ATE323052T1/de not_active IP Right Cessation
  • 2003-06-27 EP EP03741073A patent/EP1519886B1/en not_active Expired - Lifetime
  • 2003-06-27 JP JP2004519164A patent/JP4246148B2/ja not_active Expired - Lifetime
  • 2003-06-27 AU AU2003281222A patent/AU2003281222A1/en not_active Abandoned
  • 2003-06-27 US US10/496,168 patent/US7175126B2/en not_active Expired - Lifetime
  • 2003-06-27 DE DE60304576T patent/DE60304576T2/de not_active Expired - Lifetime
• 2004
  • 2004-09-28 IL IL16432204A patent/IL164322A0/xx active IP Right Grant
• 2006
  • 2006-09-18 US US11/532,695 patent/US7360738B2/en not_active Expired - Lifetime

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